To estimate the concentration of glucose in an unknown solution, equal volumes of a range of known concentrations of glucose were each mixed with the same excess volume of Benedict's solution. After mixing, the solutions were placed in a thermostatically controlled water-bath at 90 °C for three minutes. The unknown solution was then treated in the same way and the colours of the known and unknown solutions compared. What is the independent variable in this procedure?

Which feature of glycogen distinguishes glycogen from starch?

A student wrote four statements about what happens during hydrolysis of a carbohydrate. 1 Disaccharides are formed fr…

The table compares three molecules, X, Y and Z, which contain the elements carbon, hydrogen and oxygen only. The perc…

A heating sleeve was placed around the trunk of a small tree at a height of 1 m above the ground. This allowed a narr…

Which row correctly identifies the locations in which a type of molecule or cell can be present? [Table with molecule…

Which statements about the formation of haemoglobinic acid are correct? 1 It is linked to the action of carbonic anhy…